Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“is always helpful”
Google Play · 5/5 · 2026-07-27

Checks (re-run on this request)

✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
✓ Public transparency log — Sigstore Rekor log index 2513934798

Proof data

Record hash (SHA-256): 700b862e591e33865ae4de462430c67021cee48756c36b0a90d9f7aa6661953f
Signature (Ed25519, base64): PDeiHOJF8Kl9cMC2oa6V8DaRP5sNsFHEyH0pF3EJriOjcBL5a/XpLwWkJzsypV+UJNIF0KO5Rz3O25uEJoACDg==
Merkle root: 0148d24ff6e9c2ab4d5b200cf436fcaf811faf144951e67c277e5df63df916ac
Merkle path: ["700d2e0add37178490ceab5dddb711c154534b9066a2c2d6b09b3cf2fbd1473d","45a88110889f75e5aee445bbd79ee498595a7b7107690695a869fa680f39b42c","0c945d4833b48956b48595b619920ad7eb771e4227b635505e15cb0958563ecb","9f07034996a76962dad0bcb18f99f39c33783a0e834983432bd771a9f01c4aa9","b396a9e4ba803b57c96879bca4dc6b17b8ddbc490287ef36dc1aec3b7bb146c7","f6a1693a39d3ea88ddbe4588b137149bf96c5555bd1d22df1c20a18303f84276","a8929c24348245f3b4bf75eb1571ac8c23a5524aec0875d1b7e891eb390799b9","c83b17482a007f8315a0459bd19f751ff18955d061b2a033dac6acc44cc468af","778576f7450a7be0a04d76d7b2a7558f697c2bbfbd7b7de9d44d59ce319378fe","6741685a664d38185818cbce2d70b17de3000e151a57571566f7081ee604f620","d2d5b0771f1375956fe176d07e2eb0a4e7a1d21e0e37d8c54ac2f6b9cb2e073e","ae42cdbd5d6a094969a4f846458a3bd81840fee500d80d1bae9d149f3e61b4fe","dee05a48d41176f0f5ab4381f50b484efefd7f01f056a076c3a3bdcf5efe9e77","921869a075628557d48c5285732233ca6fda8483cd0012c7895889f659ad236c","eefb32e3ef6dc5b176b5121ed7a7991ded7d89d0f08c50d4493143d001bfb6b2"]
Anchored: 2026-08-19
Public log entry: search.sigstore.dev, log index 2513934798 · entry 108e9186e8c5677abbfa…
Expected log hash: 4398d73a28baccf419c99b11cbeb8ef2e4242701bb0cc17960e1b5f329faf480 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.
Canonical record: {"dataset_version":"v1787122088277","kind":"published-quote","locale":"en","page":"theme:acrobat/service/en","quote":"is always helpful","rating":5,"review_date":"2026-07-27","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.adobe.reader","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (0148d24ff6e9…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.